因此,我下載了“原始”圖像(不是正方形),對其進行了修改,使其變為正方形,運行您的代碼,得到了java.awt.image.ImagingOpException：無法轉換src圖像異常,將BufferedImage.TYPE_INT_RGB更改為BufferedImage .TYPE_INT_ARGB并得到…

import java.awt.geom.AffineTransform;

import java.awt.image.AffineTransformOp;

import java.awt.image.BufferedImage;

import java.io.IOException;

import javax.imageio.ImageIO;

import javax.swing.ImageIcon;

import javax.swing.JLabel;

import javax.swing.JOptionPane;

import javax.swing.JPanel;

public class Main {

public static void main(String[] args) {

try {

BufferedImage img = ImageIO.read(Main.class.getResource("/Block.jpg"));

BufferedImage rotate = rotate(img.getHeight(), img.getWidth(), img, 90);

JPanel panel = new JPanel();

panel.add(new JLabel(new ImageIcon(img)));

panel.add(new JLabel(new ImageIcon(rotate)));

JOptionPane.showMessageDialog(null, panel);

} catch (IOException ex) {

ex.printStackTrace();

}

}

public static BufferedImage rotate(int height, int width, BufferedImage originalImg, int angle) {

BufferedImage rotateImage = null;

try {

rotateImage = new BufferedImage(height, width, BufferedImage.TYPE_INT_ARGB);

AffineTransform a90 = AffineTransform.getRotateInstance(Math.toRadians(angle), height / 2, width / 2);

AffineTransformOp op90 = new AffineTransformOp(a90, AffineTransformOp.TYPE_BILINEAR);

op90.filter(originalImg, rotateImage);

} catch (Exception e) {

e.printStackTrace();

}

return rotateImage;

}

}

我的“直覺”感覺是還要修改rotate方法,因為它不需要寬度和高度值.

public static BufferedImage rotate(BufferedImage originalImg, int angle) {

BufferedImage rotateImage = null;

try {

rotateImage = new BufferedImage(originalImg.getWidth(), originalImg.getHeight(), BufferedImage.TYPE_INT_ARGB);

AffineTransform a90 = AffineTransform.getRotateInstance(Math.toRadians(angle), originalImg.getWidth() / 2, originalImg.getHeight() / 2);

AffineTransformOp op90 = new AffineTransformOp(a90, AffineTransformOp.TYPE_BILINEAR);

op90.filter(originalImg, rotateImage);

} catch (Exception e) {

e.printStackTrace();

}

return rotateImage;

}

它應該直接使用原始圖像的尺寸.這將突出顯示圖像中可能存在的錯誤.這還假設您只想將圖像旋轉90度

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